Chase and her little sister, Libby, didn't always get along. Chase hates picking up after her sister because it's gross. Of course, she's not exactly mature about the messy little brat. Unfortunately, their parents have gone missing and they have no one to care for them. That leaves Chase in a parental role. Raising her sister is seriously killing her social life. She doesn't even have time for school. Everything is all different. It's all about Chase's responsibilities now. #BigSisterChallenge